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OpenAI Codex

OpenAI's coding agent for the terminal, editor, desktop app and ChatGPT cloud, included in ChatGPT plans

Agent by OpenAI

IndexedApache-2.0★ 130,765
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npm install -g @openai/codex

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About

Codex is a coding agent from OpenAI. The CLI runs locally on your computer, and the same agent is also offered in IDEs, a desktop app and a cloud version at chatgpt.com/codex. It can run many agents in parallel, keep working in cloud environments after you close your laptop, and review pull requests. You sign in with a ChatGPT plan or use an API key.

Use cases: coding, code-review, code-generation, debugging

Reviews

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Fact sheet

Jobs
coding, code reviewopenai.com
Autonomy
Autonomous: runs tasks end to end and reports backopenai.com
Where you use it
Terminal, IDE, Desktop app, WebREADME
Hosting
Hosted or self-hostedREADME
Models
openaiREADME
Open source
YesREADME
Billing
Codex usage is part of ChatGPT plans; higher plans get more usageopenai.com

Facts extracted by Claude Sonnet 5.5 from the linked sources on Oct 24, 2026; reviewed Oct 24, 2026. Wrong fact? Tell us.

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    Signals

    Stars
    130,765
    Forks
    20,628
    Open issues
    24,399
    Weekly downloads
    13,075,592
    Last commit
    Oct 23, 2026 (5 days ago)
    Last release
    Oct 23, 2026 (5 days ago)
    Last package publish
    Oct 23, 2026 (5 days ago)

    From GitHub (fetched Oct 24, 2026) and the package registry.

    Details

    Packages
    npm @openai/codex
    License
    Apache-2.0
    Repository
    github.com/openai/codex
    Website
    openai.com/codex/
    Docs
    developers.openai.com/codex
    First seen
    Oct 24, 2026
    Last checked
    Oct 24, 2026
    Source
    DocsREADMEWebsitePricing pagegithub-graphql

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    Cite this page

    OpenAI Codex. Agent Mart. https://agentmart.dev/agents/openai-codex (last updated 2026-10-24)